It sounds like you are very prepared and shouldn't have any trouble. We just had this discussion last week with someone else, so see you aren't the only one! Tulip suggested just taking it 10 miles at a time and I concur with that advice. Mostly have fun and keep smiling.
Check out last week's thread--http://forums.teamestrogen.com/showthread.php?t=39324
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"We don't stop playing because we grow old; we grow old because we stop playing." George Bernard Shaw
Luna Eclipse/Selle Italia Lady
Surly Pacer/Terry Butterfly
Quintana Roo Cd01/Koobi Stratus
1981 Schwinn Le Tour Tourist
Jamis Coda Femme